131B4264 by Danfoss

The 131B4264 is an AC drive produced by Danfoss for the VLT FC 102 HVAC Drives series. Classified in the VLT HVAC Drive product group, it regulates ventilation and pump motors in commercial climate systems and other building automation tasks. The unit operates on three-phase power and is delivered with a Graphical Local Control Panel for on-site parameter access.

This model accepts a supply of 380 - 480 VAC, and the integrated RFI filter suppresses conducted emissions on the mains. A continuous output of 61 A supports normal load conditions, while an intermittent rating of 67.1 A covers short acceleration demands. Motor sizing is simplified because the drive can deliver up to 40 HP. Heat generated during operation is limited to 698 W, and that heat must be removed by the surrounding cabinet airflow. The design omits a brake chopper, and all A, B, C, C0, C1, and D option slots are left empty for installations that do not require additional interface or safety boards. Standard cable entries are fitted under Adaptation A, while Adaptation B has no further provisions.

The inverter is built on the B2 frame with a width of 243 mm, a depth of 261 mm, and a height of 664 mm. Overall mass is 29.95 kg, so the mounting points must support this static load. The specified mounting style is the Frame B & C backplate for open-drive installations, and the housing has an IP21 / Type 1 backplate rating for clean indoor rooms. Printed-circuit boards are not conformally coated, and the drive carries no mains option board. All remaining expansion slots are blank, so the power electronics, control software, and safe-stop circuitry operate without additional option features. The frame accommodates a power stage rated at 30 kW and includes a factory-installed backplate with three-phase power terminals.